HackingProfessional ServicesProfessional ServicesCustomer Data InvolvedGovernment IDIdentity (basic)HighContained

MILLIMAN, INC.

bd_ef7ad7a4aedf79b1 · schema v1 · pii pii-v1

Severity

High

Discovered

Jul 21, 2023

Filed

Aug 18, 2023

To disclose

28 days

Affected · nationwide

5,0238 in this filing

Linked

10 filings

Confidence

66%

Full breach record for MILLIMAN, INC. →5 incidents on file

Milliman, Inc. reported an external system breach (hacking) occurring between May 29 and May 30, 2023, discovered on July 21, 2023. The incident affected 5,023 individuals, including 8 Maine residents. Personal information acquired included names and Social Security Numbers. Milliman provided 24 months of credit monitoring and identity theft protection services through Kroll.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Jul 21, 2023 → Filed with AG Aug 18, 202328d ✓ ME AG ≤30d28 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 53 days

discovery → filing · 28 days

May 29, 2023

Begins

Jul 21, 2023

Discovered

Aug 18, 2023

Filed

vs. sector median

11 wks faster

This filing is one of 10 filings about the same incident.View merged incident

Part of Pension Benefit Information, LLC supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

New Hampshire State AGbd_0784ee17d069ca5f2023-08-17 · +1dVerified
California State AGbd_5fb2b809a54c9f682023-08-14 · +4dVerified
Indiana State AGbd_61914e30e6a7f2e72023-08-14 · +4dVerified
Massachusetts State AGbd_6f1acd087e5dc3602023-08-14 · +4dVerified

Show 5 more filings ↓up to 4d gap

Maine State AGbd_847189c2c427ed3b2023-08-14 · +4dCandidate
Washington State AGbd_b71e461fa51aa4b22023-08-14 · +4dVerified
Oregon State AGbd_c290a9c83b4262b52023-08-14 · +4dVerified
Idaho State AGbd_d1cb5766b2805d522023-08-14 · +4dVerified
Montana State AGbd_efdfa8d0534820d32023-08-14 · +4dVerified

Name: MILLIMAN, INC.
norm: milliman
Domain: us.milliman.com

Name: MILLIMAN, INC.
norm: milliman
Domain: us.milliman.com
Industry: Professional Servicesllm

Discovered: Jul 21, 2023
Breach occurred: May 29, 2023 – May 30, 2023
Undetected for: 53 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 18, 2023
Affected individuals: 5,023state + nationwide
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Initial access: exploit_public_facing

During the incident: Provided 24 months of credit monitoring and identity theft protection services through Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 28 days(28 days from discovery to filing)
Compliance flags: ME AG ≤30d · 28d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Jul 21, 2023
→ Filed with AG: Aug 18, 2023
28d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Jul 21, 2023 → Filed with AG: Aug 18, 2023	28d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 9 states

View merged incident ↗

California State AGAug 14 · first

Indiana State AGAug 14 · first

Massachusetts State AGAug 14 · first

Maine State AGAug 14 · first

Washington State AGAug 14 · first

Oregon State AGAug 14 · first

Idaho State AGAug 14 · first

Montana State AGAug 14 · first

New Hampshire State AG+3d

Maine State AG+4d · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/c977e992-b5da-4e74-b17b-0039f1ac5319.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 18, 2023
Raw hash: 34f150bba41311a2faf082a18d1b2f73288f447fe66c929167581eb80abc7127

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityMILLIMAN, INC.

Victim entityMILLIMAN, INC.

Incidentdiscovered Jul 21, 2023

Stated responseProvided 24 months of credit monitoring and identity theft protection services through Kroll

ComplianceME AG ≤30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov